12 ns asynchronous SRAM for industrial bus-interface designs
The Infineon CY7C1049CV33-12ZSXAT is a 4Mbit asynchronous SRAM organized as 512K x 8 bits, with a 12 ns access time that keeps bus turnaround tight in 3.3V-logic systems.
A 12 ns access time means the SRAM can complete a read cycle within one clock edge of a 66 MHz bus without wait states, or two edges of a 100 MHz bus. For a 3.3V asynchronous interface, that timing gives the memory controller a clean setup-and-hold window, especially important when the SRAM shares a bus with a NOR Flash or a peripheral FPGA that also runs at similar speed.
Industrial temperature grade and environment
The 44-TSOP II package (0.400" body width, 10.16 mm) is a standard surface-mount footprint that reflows with conventional lead-free profiles and is straightforward to inspect and rework.
Infineon lists the CY7C1049CV33-12ZSXAT as obsolete. For BOM lines that still need this exact part — legacy production runs, field-service spares, or qualification-locked designs — the supply channel is independent distribution and surplus inventory.